AdminLTE is a professional, open-source admin dashboard template and UI framework built on Bootstrap 5.3. It provides a comprehensive set of responsive layout components, widgets, and vanilla TypeScript plugins (sidebar push menu, treeview, card widget, direct chat, fullscreen toggling, color mode, sidebar search, accessibility manager) activated via data-lte-* attributes. The architecture is modular: SCSS sources are compiled into a production-ready CSS bundle, and TypeScript sources are bundled into UMD and ESM builds. The project includes an extensive demo site with over 50 pages (dashboard, tables, forms, charts, mailbox, etc.) and a documentation site built with Astro and MDX. It ships with an optional extended color palette (14 WCAG AA-compliant colors) and a runtime primary color switcher, as well as a legacy v3 color compatibility sheet. The repository is the HTML/JS/CSS core; framework-specific editions exist for React, Vue, Angular, Laravel, and others.